An adaptive algorithm for reducing phase error in digital carrier recovery for high-order QAM signals

作者：Bornoosh Babak^*; Nabavi Abdolreza

来源：IEICE Electronics Express, 2010, 7(7): 493-499.

DOI：10.1587/elex.7.493

• digital carrier recovery
• phase error
• phase estimation
• QAM

This paper describes an adaptive software aided technique for phase error reduction in digital carrier recovery (CR) for high-order Quadrature Amplitude Modulation (QAM). Simulations and analytical results illustrate a phase error variance improvement of at least 30 dB compared to conventional CR, leading to more than 3 dB processing gain enhancement for high-order QAM, using the simple 4(th) power phase estimation technique. The new technique can be employed to improve the performance of any CR loop, at the cost of slight complexity overhead independent of the modulation order.

• 出版日期2010-4-10